# Make bison/src.

# Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008 Free Software
# Foundation, Inc.

# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

AM_CFLAGS = $(WARN_CFLAGS) $(WERROR_CFLAGS)
AM_CPPFLAGS = -I$(top_srcdir)/lib
AM_YFLAGS = "-dv"

LDADD = ../lib/libbison.a $(LIBINTL)

# Use our own Bison to build the parser.  Of course, you ought to
# keep a sane version of Bison nearby...
YACC = ../tests/bison -y --warnings=all,error

bin_PROGRAMS = bison
bin_SCRIPTS = $(YACC_SCRIPT)
EXTRA_SCRIPTS = yacc

bison_SOURCES =					  \
	LR0.c LR0.h				  \
	assoc.c assoc.h				  \
	closure.c closure.h			  \
	complain.c complain.h			  \
	conflicts.c conflicts.h			  \
	derives.c derives.h			  \
	files.c files.h				  \
	flex-scanner.h				  \
	getargs.c getargs.h			  \
	gram.c gram.h				  \
	lalr.h lalr.c				  \
	location.c location.h			  \
	main.c					  \
	muscle_tab.c muscle_tab.h		  \
	nullable.c nullable.h			  \
	output.c output.h			  \
	parse-gram.h parse-gram.y		  \
	print.c print.h				  \
	print_graph.c print_graph.h		  \
	print-xml.c print-xml.h			  \
	reader.c reader.h			  \
	reduce.c reduce.h			  \
	relation.c relation.h			  \
	scan-code.h scan-code-c.c		  \
	scan-gram.h scan-gram-c.c		  \
	scan-skel.h scan-skel-c.c		  \
	state.c state.h				  \
	symlist.c symlist.h			  \
	symtab.c symtab.h			  \
	system.h				  \
	tables.h tables.c			  \
	uniqstr.c uniqstr.h			  \
	graphviz.c graphviz.h

EXTRA_bison_SOURCES = scan-code.l scan-skel.l scan-gram.l

BUILT_SOURCES =					\
parse-gram.c parse-gram.h			\
scan-code.c					\
scan-skel.c					\
scan-gram.c

MOSTLYCLEANFILES = yacc

yacc:
	echo '#! /bin/sh' >$@
	echo "exec '$(bindir)/bison' -y "'"$$@"' >>$@
	chmod a+x $@

echo:
	echo $(bison_SOURCES) $(noinst_HEADERS)

# The following rule is not designed to be portable,
# and relies on tools that not everyone has.

# Most functions in src/*.c should have static scope.
# Any that don't must be marked with `extern', but `main'
# and `usage' are exceptions.  They're always extern, but
# don't need to be marked.
#
# The second nm|grep checks for file-scope variables with `extern' scope.
sc_tight_scope: $(all_programs)
	@t=exceptions-$$$$;						\
	trap 's=$$?; rm -f $$t; exit $$s' 0 1 2 13 15;			\
	( printf '^main$$\n^usage$$\n';					\
	  grep -h -A1 '^extern .*[^;]$$' $(SOURCES)			\
	    | grep -vE '^(extern |--)' |sed 's/^/^/;s/ .*/$$/' ) > $$t;	\
	if nm -e *.$(OBJEXT)						\
	    | sed -n 's/.* T //p'					\
	    | grep -Ev -f $$t; then					\
	  echo 'the above functions should have static scope' 1>&2;	\
	  exit 1;							\
	fi;								\
	( printf '^program_name$$\n';					\
	  sed -n 's/^extern .*[* ]\([a-zA-Z_][a-zA-Z_0-9]*\);$$/^\1$$/p' \
	    $$(ls $(SOURCES) | grep '\.h$$') /dev/null) > $$t;		\
	if nm -e *.$(OBJEXT)						\
	    | sed -n 's/.* [BD] //p'					\
	    | grep -Ev -f $$t; then					\
	  echo 'the above variables should have static scope' 1>&2;	\
	  exit 1;							\
	fi
